| Message ID | 1497270250-11353-1-git-send-email-ulf.hansson@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 12/06/17 15:24, Ulf Hansson wrote: > The MMC_CAP2_HC_ERASE_SZ is used only by a few mmc host drivers. Its intent > is to enable eMMC's high-capacity erase size, as to improve the behaviour > of the erase operations. > > We should strive to avoid software configuration options that aren't > necessary, but instead deploy common behaviours. For these reasons, let's > remove the capability bit for MMC_CAP2_HC_ERASE_SZ and make it the default > behaviour. > > Note that this change doesn't affect eMMCs supporting trim/discard, because > these commands operates on sectors and takes precedence over erase > commands. > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> > --- > > Changes in v2: > - Make the behaviour from MMC_CAP2_HC_ERASE_SZ the default. > - Update changelog to reflect the change. > > --- > drivers/mmc/core/mmc.c | 8 ++------ > drivers/mmc/host/sdhci-acpi.c | 1 - > drivers/mmc/host/sdhci-brcmstb.c | 3 --- > drivers/mmc/host/sdhci-pci-core.c | 4 +--- > include/linux/mmc/host.h | 1 - > 5 files changed, 3 insertions(+), 14 deletions(-) > > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c > index e504b66..4ffea14 100644 > --- a/drivers/mmc/core/mmc.c > +++ b/drivers/mmc/core/mmc.c > @@ -1651,12 +1651,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, > mmc_set_erase_size(card); > } > > - /* > - * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF > - * bit. This bit will be lost every time after a reset or power off. > - */ > - if (card->ext_csd.partition_setting_completed || > - (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) { > + /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */ > + if (card->ext_csd.rev >= 3) { > err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, > EXT_CSD_ERASE_GROUP_DEF, 1, > card->ext_csd.generic_cmd6_time); > diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c > index 89d9a8c..cf66a3d 100644 > --- a/drivers/mmc/host/sdhci-acpi.c > +++ b/drivers/mmc/host/sdhci-acpi.c > @@ -274,7 +274,6 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { > .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | > MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | > MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY, > - .caps2 = MMC_CAP2_HC_ERASE_SZ, > .flags = SDHCI_ACPI_RUNTIME_PM, > .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, > .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | > diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c > index 242c5dc..e2f6383 100644 > --- a/drivers/mmc/host/sdhci-brcmstb.c > +++ b/drivers/mmc/host/sdhci-brcmstb.c > @@ -89,9 +89,6 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev) > goto err_clk; > } > > - /* Enable MMC_CAP2_HC_ERASE_SZ for better max discard calculations */ > - host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ; > - > sdhci_get_of_property(pdev); > mmc_of_parse(host->mmc); > > diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c > index 8fa84a0..227a5cb 100644 > --- a/drivers/mmc/host/sdhci-pci-core.c > +++ b/drivers/mmc/host/sdhci-pci-core.c > @@ -347,8 +347,7 @@ static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot) > static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot) > { > slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE; > - slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC | > - MMC_CAP2_HC_ERASE_SZ; > + slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC; > return 0; > } > > @@ -587,7 +586,6 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot) > MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | > MMC_CAP_CMD_DURING_TFR | > MMC_CAP_WAIT_WHILE_BUSY; > - slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ; > slot->hw_reset = sdhci_pci_int_hw_reset; > if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC) > slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */ > diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h > index 9209f95..c81380a 100644 > --- a/include/linux/mmc/host.h > +++ b/include/linux/mmc/host.h > @@ -287,7 +287,6 @@ struct mmc_host { > #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */ > #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \ > MMC_CAP2_HS200_1_2V_SDR) > -#define MMC_CAP2_HC_ERASE_SZ (1 << 9) /* High-capacity erase size */ > #define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10) /* Card-detect signal active high */ > #define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11) /* Write-protect signal active high */ > #define MMC_CAP2_PACKED_RD (1 << 12) /* Allow packed read */ > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Jun 12, 2017 at 2:24 PM, Ulf Hansson <ulf.hansson@linaro.org> wrote: > The MMC_CAP2_HC_ERASE_SZ is used only by a few mmc host drivers. Its intent > is to enable eMMC's high-capacity erase size, as to improve the behaviour > of the erase operations. > > We should strive to avoid software configuration options that aren't > necessary, but instead deploy common behaviours. For these reasons, let's > remove the capability bit for MMC_CAP2_HC_ERASE_SZ and make it the default > behaviour. > > Note that this change doesn't affect eMMCs supporting trim/discard, because > these commands operates on sectors and takes precedence over erase > commands. > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> > --- > > Changes in v2: > - Make the behaviour from MMC_CAP2_HC_ERASE_SZ the default. > - Update changelog to reflect the change. Looks correct to me. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On 2017/6/12 20:24, Ulf Hansson wrote: > The MMC_CAP2_HC_ERASE_SZ is used only by a few mmc host drivers. Its intent > is to enable eMMC's high-capacity erase size, as to improve the behaviour > of the erase operations. > > We should strive to avoid software configuration options that aren't > necessary, but instead deploy common behaviours. For these reasons, let's > remove the capability bit for MMC_CAP2_HC_ERASE_SZ and make it the default > behaviour. > > Note that this change doesn't affect eMMCs supporting trim/discard, because > these commands operates on sectors and takes precedence over erase > commands. > A quick test shows it's good to make it default behaviour, so Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com> Tested-by: Shawn Lin <shawn.lin@rock-chips.com> > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> > --- > > Changes in v2: > - Make the behaviour from MMC_CAP2_HC_ERASE_SZ the default. > - Update changelog to reflect the change. > > --- > drivers/mmc/core/mmc.c | 8 ++------ > drivers/mmc/host/sdhci-acpi.c | 1 - > drivers/mmc/host/sdhci-brcmstb.c | 3 --- > drivers/mmc/host/sdhci-pci-core.c | 4 +--- > include/linux/mmc/host.h | 1 - > 5 files changed, 3 insertions(+), 14 deletions(-) > > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c > index e504b66..4ffea14 100644 > --- a/drivers/mmc/core/mmc.c > +++ b/drivers/mmc/core/mmc.c > @@ -1651,12 +1651,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, > mmc_set_erase_size(card); > } > > - /* > - * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF > - * bit. This bit will be lost every time after a reset or power off. > - */ > - if (card->ext_csd.partition_setting_completed || > - (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) { > + /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */ > + if (card->ext_csd.rev >= 3) { > err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, > EXT_CSD_ERASE_GROUP_DEF, 1, > card->ext_csd.generic_cmd6_time); > diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c > index 89d9a8c..cf66a3d 100644 > --- a/drivers/mmc/host/sdhci-acpi.c > +++ b/drivers/mmc/host/sdhci-acpi.c > @@ -274,7 +274,6 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { > .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | > MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | > MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY, > - .caps2 = MMC_CAP2_HC_ERASE_SZ, > .flags = SDHCI_ACPI_RUNTIME_PM, > .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, > .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | > diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c > index 242c5dc..e2f6383 100644 > --- a/drivers/mmc/host/sdhci-brcmstb.c > +++ b/drivers/mmc/host/sdhci-brcmstb.c > @@ -89,9 +89,6 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev) > goto err_clk; > } > > - /* Enable MMC_CAP2_HC_ERASE_SZ for better max discard calculations */ > - host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ; > - > sdhci_get_of_property(pdev); > mmc_of_parse(host->mmc); > > diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c > index 8fa84a0..227a5cb 100644 > --- a/drivers/mmc/host/sdhci-pci-core.c > +++ b/drivers/mmc/host/sdhci-pci-core.c > @@ -347,8 +347,7 @@ static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot) > static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot) > { > slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE; > - slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC | > - MMC_CAP2_HC_ERASE_SZ; > + slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC; > return 0; > } > > @@ -587,7 +586,6 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot) > MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | > MMC_CAP_CMD_DURING_TFR | > MMC_CAP_WAIT_WHILE_BUSY; > - slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ; > slot->hw_reset = sdhci_pci_int_hw_reset; > if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC) > slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */ > diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h > index 9209f95..c81380a 100644 > --- a/include/linux/mmc/host.h > +++ b/include/linux/mmc/host.h > @@ -287,7 +287,6 @@ struct mmc_host { > #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */ > #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \ > MMC_CAP2_HS200_1_2V_SDR) > -#define MMC_CAP2_HC_ERASE_SZ (1 << 9) /* High-capacity erase size */ > #define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10) /* Card-detect signal active high */ > #define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11) /* Write-protect signal active high */ > #define MMC_CAP2_PACKED_RD (1 << 12) /* Allow packed read */ > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index e504b66..4ffea14 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1651,12 +1651,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, mmc_set_erase_size(card); } - /* - * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF - * bit. This bit will be lost every time after a reset or power off. - */ - if (card->ext_csd.partition_setting_completed || - (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) { + /* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */ + if (card->ext_csd.rev >= 3) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_ERASE_GROUP_DEF, 1, card->ext_csd.generic_cmd6_time); diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index 89d9a8c..cf66a3d 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -274,7 +274,6 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY, - .caps2 = MMC_CAP2_HC_ERASE_SZ, .flags = SDHCI_ACPI_RUNTIME_PM, .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c index 242c5dc..e2f6383 100644 --- a/drivers/mmc/host/sdhci-brcmstb.c +++ b/drivers/mmc/host/sdhci-brcmstb.c @@ -89,9 +89,6 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev) goto err_clk; } - /* Enable MMC_CAP2_HC_ERASE_SZ for better max discard calculations */ - host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ; - sdhci_get_of_property(pdev); mmc_of_parse(host->mmc); diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c index 8fa84a0..227a5cb 100644 --- a/drivers/mmc/host/sdhci-pci-core.c +++ b/drivers/mmc/host/sdhci-pci-core.c @@ -347,8 +347,7 @@ static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot) static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot) { slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE; - slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC | - MMC_CAP2_HC_ERASE_SZ; + slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC; return 0; } @@ -587,7 +586,6 @@ static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot) MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY; - slot->host->mmc->caps2 |= MMC_CAP2_HC_ERASE_SZ; slot->hw_reset = sdhci_pci_int_hw_reset; if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC) slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */ diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 9209f95..c81380a 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -287,7 +287,6 @@ struct mmc_host { #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */ #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \ MMC_CAP2_HS200_1_2V_SDR) -#define MMC_CAP2_HC_ERASE_SZ (1 << 9) /* High-capacity erase size */ #define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10) /* Card-detect signal active high */ #define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11) /* Write-protect signal active high */ #define MMC_CAP2_PACKED_RD (1 << 12) /* Allow packed read */
The MMC_CAP2_HC_ERASE_SZ is used only by a few mmc host drivers. Its intent is to enable eMMC's high-capacity erase size, as to improve the behaviour of the erase operations. We should strive to avoid software configuration options that aren't necessary, but instead deploy common behaviours. For these reasons, let's remove the capability bit for MMC_CAP2_HC_ERASE_SZ and make it the default behaviour. Note that this change doesn't affect eMMCs supporting trim/discard, because these commands operates on sectors and takes precedence over erase commands. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- Changes in v2: - Make the behaviour from MMC_CAP2_HC_ERASE_SZ the default. - Update changelog to reflect the change. --- drivers/mmc/core/mmc.c | 8 ++------ drivers/mmc/host/sdhci-acpi.c | 1 - drivers/mmc/host/sdhci-brcmstb.c | 3 --- drivers/mmc/host/sdhci-pci-core.c | 4 +--- include/linux/mmc/host.h | 1 - 5 files changed, 3 insertions(+), 14 deletions(-) -- 2.7.4